<?php

$host="localhost:3307"; // Host name
$username="root"; // Mysql username
$password="minh"; // Mysql password
$db_name="relationship"; // Database name
$tbl_name="members"; // Table name



// Connect to server and select databse.
mysql_connect("$host", "$username", "$password")or die("cannot connect");
mysql_select_db("$db_name")or die("cannot select DB $db");


// username and password sent from form
$myusername=$_POST['myusername'];
$mypassword=$_POST['mypassword'];



// To protect MySQL injection (more detail about MySQL injection)
$myusername = stripslashes($myusername);
$mypassword = stripslashes($mypassword);
$myusername = mysql_real_escape_string($myusername);
$mypassword = mysql_real_escape_string($mypassword);

$sql="SELECT * FROM $tbl_name WHERE username='$myusername' and password='$mypassword'";
$result=mysql_query($sql);



// Mysql_num_row is counting table row
$count=mysql_num_rows($result);

// If result matched $myusername and $mypassword, table row must be 1 row
if($count==1){

	// Register $myusername, $mypassword and redirect to file "login_success.php"\
	session_start();
	$_SESSION['myusername']=$myusername;
	$_SESSION['mypassword']=$mypassword;
	header("location:login_success.php");
}
else {
	echo "Wrong Username or Password";
}
?>
